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UAL503

BOS → ORD · Boeing 737-800 · United Airlines

Flight

Status
Completed
Departure
General Edward Lawrence Logan International Airport (BOS) — Boston, United States
Departed
2026-08-17 14:34 UTC
Arrival
Chicago O'Hare International Airport (ORD) — Chicago, United States
Distance flown
3144 km
Straight-line distance
1391 km
Approach distance
243 km

Aircraft

Registration
N76254
Type
Boeing 737-800
Seats
166 total (102 Economy, 48 Economy Plus, 16 First)

Altitude & speed

Max altitude
34,000 ft
Max ground speed
449 kt
Tracked
2h 33m · 2,533 km
Altitude (ft, max 34,000)
018,36036,7200m30m1h 0m1h 30m2h 0m2h 30m
Ground speed (kt, max 449)
02424850m30m1h 0m1h 30m2h 0m2h 30m
Altitude (ft, max 34,000)
018,36036,7200m1h 0m2h 0m
Ground speed (kt, max 449)
02424850m1h 0m2h 0m

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-02 14:30 UTC UAL503 BOS → ORD
Boston → Chicago
 N77537 Boeing 737-800 In progress ~1391 km est.
2026-10-01 14:34 UTC UAL503 BOS → ORD
Boston → Chicago
 N78524 Boeing 737-800 Completed (landing confirmed by airport data) 1553 km
2026-09-29 14:41 UTC UAL503 BOS → ORD
Boston → Chicago
 N27205 Boeing 737-800 Completed 1483 km
2026-09-28 15:47 UTC UAL503 BOS → ORD
Boston → Chicago
 N24224 Boeing 737-800 Completed 1503 km
2026-09-27 16:25 UTC UAL503 BOS → ORD
Boston → Chicago
 N78524 Boeing 737-800 Completed 1492 km
2026-09-26 22:08 UTC UAL503 ORD → EGE
Chicago → Eagle
 N27733 Boeing 737-700 Incomplete (signal lost) 1697 km
2026-09-26 14:47 UTC UAL503 BOS → ORD
Boston → Chicago
 N33714 Boeing 737-700 Completed 1538 km
2026-09-25 21:49 UTC UAL503 ORD → EGE
Chicago → Eagle
 N24736 Boeing 737-700 Incomplete (signal lost) 1607 km
2026-09-25 14:47 UTC UAL503 BOS → ORD
Boston → Chicago
 N437UA Airbus A320 233 Completed 1540 km
2026-09-24 14:49 UTC UAL503 BOS → ORD
Boston → Chicago
 N452UA Airbus A320 233 Completed 1515 km
2026-09-23 14:36 UTC UAL503 BOS → ORD
Boston → Chicago
 N17358 Boeing 737 MAX 8 Completed 1560 km
2026-09-22 14:39 UTC UAL503 BOS → ORD
Boston → Chicago
 N37307 Boeing 737 MAX 8 Completed 1554 km
2026-09-21 14:45 UTC UAL503 BOS → ORD
Boston → Chicago
 N17312 Boeing 737 MAX 8 Completed 1548 km
2026-09-20 14:51 UTC UAL503 BOS → ORD
Boston → Chicago
 N27269 Boeing 737 MAX 8 Completed 1666 km
2026-09-19 16:37 UTC UAL503 BOS → ORD
Boston → Chicago
 N17301 Boeing 737 MAX 8 Completed 1660 km
2026-09-18 15:05 UTC UAL503 BOS → ORD
Boston → Chicago
 N47332 Boeing 737 MAX 8 Completed 1604 km
2026-09-17 16:54 UTC UAL503 BOS → ORD
Boston → Chicago
 N17331 Boeing 737 MAX 8 Completed 1596 km
2026-09-16 14:31 UTC UAL503 BOS → ORD
Boston → Chicago
 N27568 Boeing 737 MAX 9 Completed 1650 km
2026-09-15 16:32 UTC UAL503 BOS → ORD
Boston → Chicago
 N17363 Boeing 737 MAX 8 Completed 1662 km
2026-09-14 14:44 UTC UAL503 BOS → ORD
Boston → Chicago
 N47291 Boeing 737 MAX 8 Completed 1612 km
2026-09-13 14:37 UTC UAL503 BOS → ORD
Boston → Chicago
 N17346 Boeing 737 MAX 8 Completed 1602 km
2026-09-12 14:29 UTC UAL503 BOS → ORD
Boston → Chicago
 N27334 Boeing 737 MAX 8 Completed 1610 km
2026-09-11 14:39 UTC UAL503 BOS → ORD
Boston → Chicago
 N63899 Boeing 737-900 Completed 1686 km
2026-09-10 14:32 UTC UAL503 BOS → ORD
Boston → Chicago
 N62884 Boeing 737-900 Completed 1702 km
2026-09-09 14:39 UTC UAL503 BOS → ORD
Boston → Chicago
 N27251 Boeing 737 MAX 8 Completed 1598 km
2026-09-07 14:42 UTC UAL503 BOS → ORD
Boston → Chicago
 N67350 Boeing 737 MAX 8 Completed 1654 km
2026-09-06 14:51 UTC UAL503 BOS → ORD
Boston → Chicago
 N14231 Boeing 737-800 Completed 1668 km
2026-09-05 14:38 UTC UAL503 BOS → ORD
Boston → Chicago
 N27267 Boeing 737 MAX 8 Completed 1616 km
2026-09-04 15:32 UTC UAL503 BOS → ORD
Boston → Chicago
 N27290 Boeing 737 MAX 8 Completed 1835 km
2026-09-03 14:48 UTC UAL503 BOS → ORD
Boston → Chicago
 N27270 Boeing 737 MAX 8 Completed 1617 km
2026-09-02 14:48 UTC UAL503 BOS → ORD
Boston → Chicago
 N77259 Boeing 737 MAX 8 Completed 1675 km
2026-09-01 14:40 UTC UAL503 BOS → ORD
Boston → Chicago
 N27271 Boeing 737 MAX 8 Completed 1588 km
2026-08-31 15:01 UTC UAL503 BOS → ORD
Boston → Chicago
 N17595 Boeing 737 MAX 9 Completed 1664 km
2026-08-30 15:57 UTC UAL503 BOS → ORD
Boston → Chicago
 N17346 Boeing 737 MAX 8 Completed 1709 km
2026-08-29 14:33 UTC UAL503 BOS → ORD
Boston → Chicago
 N47280 Boeing 737 MAX 8 Completed 1637 km
2026-08-28 14:31 UTC UAL503 BOS → ORD
Boston → Chicago
 N61887 Boeing 737-900 Completed 1603 km
2026-08-27 14:35 UTC UAL503 BOS → ORD
Boston → Chicago
 N27267 Boeing 737 MAX 8 Completed 1684 km
2026-08-26 14:28 UTC UAL503 BOS → ORD
Boston → Chicago
 N37450 Boeing 737 MAX 9 Completed 1626 km
2026-08-25 14:33 UTC UAL503 BOS → ORD
Boston → Chicago
 N27277 Boeing 737 MAX 8 Completed 1624 km
2026-08-24 14:42 UTC UAL503 BOS → ORD
Boston → Chicago
 N47369 Boeing 737 MAX 8 Completed 1637 km
2026-08-23 14:38 UTC UAL503 BOS → ORD
Boston → Chicago
 N17301 Boeing 737 MAX 8 Completed 2074 km
2026-08-22 14:38 UTC UAL503 BOS → ORD
Boston → Chicago
 N14214 Boeing 737-800 Completed 2141 km
2026-08-21 15:11 UTC UAL503 BOS → ORD
Boston → Chicago
 N17311 Boeing 737 MAX 8 Completed 2085 km
2026-08-20 15:19 UTC UAL503 BOS → ORD
Boston → Chicago
 N17272 Boeing 737 MAX 7 Completed ~4609 km est. (3198 km recorded)
2026-08-19 14:37 UTC UAL503 BOS → ORD
Boston → Chicago
 N37352 Boeing 737 MAX 8 Completed 3141 km
2026-08-18 14:41 UTC UAL503 BOS → ORD
Boston → Chicago
 N47293 Boeing 737 MAX 8 Completed 4929 km
2026-08-17 14:34 UTC UAL503 BOS → ORD
Boston → Chicago
 N76254 Boeing 737-800 Completed 3144 km
2026-08-16 14:55 UTC UAL503 BOS → ORD
Boston → Chicago
 N37295 Boeing 737 MAX 8 Completed 2509 km
2026-08-14 14:41 UTC UAL503 BOS → ORD
Boston → Chicago
 N27267 Boeing 737 MAX 8 Completed ~5056 km est. (2122 km recorded)
2026-08-12 17:22 UTC UAL503 BOS → ORD
Boston → Chicago
 N47280 Boeing 737 MAX 8 Completed 2311 km

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